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Finding the Fourth Proportional to 454.98, 628.10 and 355.55

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Solution

The fourth proportional to 454.98, 628.10 and 355.55 is: 490.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.98 : 628.10 = 355.55 : x
  2. Step 2: Convert to fraction form
    454.98/628.10 = 355.55/x
  3. Step 3: Cross multiply
    454.98x = 628.10 × 355.55
  4. Step 4: Simplify right side
    454.98x = 223,317.37
  5. Step 5: Solve for x
    x = 223,317.37/454.98
  6. Step 6: Final answer
    x = 490.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.